package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    /**
     * 新增菜品
     * @param dishDTO
     */
    @Override
    public void save(DishDTO dishDTO) {
//        新增菜品
        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.inset(dish);
//        新增口味
        List<DishFlavor> dishFlavors = dishDTO.getFlavors();
        if (dishFlavors != null && dishFlavors.size() > 0){
            dishFlavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dish.getId());
            });
            dishFlavorMapper.insetBatch(dishFlavors);
        }
    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page=dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 批量删除菜品
     * @param ids
     */
    @Transactional
    public void deleteBatch(List<Long> ids) {
//        检查菜品是否处于起售状态
        for (long id : ids){
            Dish dish=dishMapper.getById(id);
            if (dish.getStatus() == StatusConstant.ENABLE)
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
        }
//        检查菜品是否与其他菜品关联
        List<Long> setmealId = setmealDishMapper.getSetmealIdByDishIds(ids);
        if (setmealId != null && setmealId.size() > 0)
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
//        删除菜品及其口味
            dishMapper.deleteByids(ids);
            dishFlavorMapper.deleteByids(ids);
    }

    /**
     * 根据id查询菜品
     * @param id
     * @return
     */
    @Override
    public DishVO getDishWithFlavorById(Long id) {
        Dish dish = dishMapper.getById(id);
        List<DishFlavor> dishFlavor=dishFlavorMapper.getById(id);

        DishVO dishVO=new DishVO();
        dishVO.setFlavors(dishFlavor);
        BeanUtils.copyProperties(dish,dishVO);
        return dishVO;
    }

    /**
     * 修改菜品基本信息与其口味信息
     * @param dishDTO
     */
    @Override
    public void upDataDish(DishDTO dishDTO) {
        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.updateDish(dish);

        dishFlavorMapper.deleteByid(dishDTO.getId());
        List<DishFlavor> dishFlavors = dishDTO.getFlavors();
        if (dishFlavors != null && dishFlavors.size() > 0){
            dishFlavors.forEach(dishFlavor -> dishFlavor.setDishId(dishDTO.getId()));
            dishFlavorMapper.insetBatch(dishFlavors);
        }
    }

    /**
     * 修改菜品状态
     * @param status
     * @param id
     */
    @Override
    public void status(Integer status, Long id) {
        Dish dish = new Dish();
        dish.setStatus(status);
        dish.setId(id);
        dishMapper.updateDish(dish);
    }

    /**
     * 根据分类id查询菜品
     * @param id
     * @return
     */
    @Override
    public List<Dish> list(Long id) {
        Dish dish = Dish.builder()
            .id(id)
            .status(StatusConstant.ENABLE)
            .build();
        return dishMapper.list(dish);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getById(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
